gem - Uninstall capistrano and install particular version in ruby-1.8.7 -

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i working application of ruby-1.8.7 client.

i got error when tried deploy on staging using cap staging deploy command.

right now, installed capistrano-3.2.1 version. now, want remove , install capistrano-2.5.19 version.

how change version of capistrano or uninstall , install new.

how install capistrano ruby-1.8.7 compatible verions.

i got every time error: error installing capistrano. highline required ruby version >= 1.9.3

thanks

/.rvm/gems/ruby-1.8.7-p374/gems/capistrano-3.2.1

$ gem uninstall capistrano  select gem uninstall:  1. capistrano-2.12.0  2. capistrano-3.5.0  3. versions > 2 uninstalled capistrano-3.5.0

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